Clinical Trial Details
— Status: Completed
Administrative data
| NCT number |
NCT04619446 |
| Other study ID # |
AFIDPakistan |
| Secondary ID |
|
| Status |
Completed |
| Phase |
|
| First received |
|
| Last updated |
|
| Start date |
September 12, 2020 |
| Est. completion date |
November 1, 2021 |
Study information
| Verified date |
July 2022 |
| Source |
Armed Forces Institute of Dentistry, Pakistan |
| Contact |
n/a |
| Is FDA regulated |
No |
| Health authority |
|
| Study type |
Observational
|
Clinical Trial Summary
To compare dentoskeletal changes in patients with skeletal class II malocclusion induced due
to treatment with orthodontic appliances; removable twin block appliance and fixed AdvanSync2
appliance in two different age group patients.
Description:
41% of total orthodontic cases in Pakistani population are of class II malocclusion. Class II
malocclusion is referred as maxillary protrusion, or mandibular retrusion, or combination of
both, which can be corrected by treating the skeletal and dento-alveolar discrepancies. Out
of many recommended treatment options, one can make use of either removable and/or fixed
functional appliances. In the past, headgear has been used as a classic appliance for the
correction of class II malocclusion. Other removable functional appliances (RFA) include
Frankel, bionator and sander bite jumping appliances. Jasper jumper, Herbst appliance and
mandibular protraction appliance (MPA) are the some of the fixed functional appliances (FFA)
used. All these modalities are designed to modify the arches by re-orienting their position
in both sagittal and vertical dimensions to bring about correction of main features of class
II malocclusion.
AdvanSync2 (Ormco Co., Glendora, Calif) is a FFA being introduced recently as an advancement
of Herbst appliance. It is a molar-to-molar appliance, connected by a telescopic rod, which
allow for simultaneous treatment with braces. It is much smaller in size than the
conventional Herbst appliance and reduces treatment duration up to six to nine months. It is
much more acceptable by the patients as they complain less about sores and discomfort, and is
esthetically pleasant since it's not visible in the mouth. Short arms of this appliance help
to decrease irritation and discomfort of the patient, and helps to advance the mandible in a
constant forward direction to encourage growth, and reduce malocclusion.
Twin block appliance (RFA) was introduced by William Clark in 1988. Many modifications for
this appliance have been introduced lately. It has been named twin block for the
characteristic of two unattached maxillary and mandibular plates with acrylic bite blocks,
which makes 70o angle when come in contact with each other. This appliance is another
treatment modality for cases with class II malocclusions, which can be carried out at an
early age as well as the delayed treatment. However, delayed treatment was found to be much
better for the patients in terms of less orthodontic visits.
AdvanSync2 appliance is a new treatment modality in orthodontics, and through thorough
literature search, no study could be found in regard to this appliance in Pakistani
population yet.Hence, the objective of this study was to compare dentoskeletal changes in
skeletal class II malocclusion induced due to treatment with removable twin block appliance
and fixed advanSync2 appliance in Pakistani population.
